Quantized Majorana Conductance (II): Zero Bias Peak as a Quantized Plateau

ORAL

Abstract

Tunneling into a Majorana state will resolve a zero-bias-peak (ZBP) in the differential conductance. This tunneling process is a so-called Andreev reflection, where an incoming electron is reflected as a hole. Particle-hole symmetry dictates that the zero-energy tunneling amplitudes of electrons and holes are equal, resulting in a perfect resonant transmission with a ZBP-height quantized at 2e2/h, irrespective of the precise tunneling strength. The Majorana-nature of this perfect Andreev reflection is a direct result of the well-known Majorana symmetry property “particle equals antiparticle”. Here we show the observed ZBP-height remains as a constant at 2e2/h, against the change of the tunneling strength, i.e. a quantized Majorana plateau. This quantized tunnel-conductance plateau can uniquely identify a topological Majorana zero-mode as far as tunneling spectroscopy is concerned.

–

Presenters

  • Hao Zhang

    Delft Univ of Tech

Authors

  • Hao Zhang

    Delft Univ of Tech

  • Di Xu

    Delft Univ of Tech, QuTech and Kavli Institute of Nanoscience, Delft University of Technology

  • Chun-Xiao Liu

    University of Maryland

  • Guanzhong Wang

    Delft Univ of Tech, QuTech and Kavli Institute of Nanoscience, Delft University of Technology

  • Nick van Loo

    Delft Univ of Tech, QuTech and Kavli Institute of Nanoscience, Delft University of Technology

  • Jouri Bommer

    Delft Univ of Tech, QuTech and Kavli Institute of Nanoscience, Delft University of Technology

  • Michiel de Moor

    Delft Univ of Tech

  • Sasa Gazibegovic

    Department of Applied Physics, Eindhoven University of Technology, Eindhoven Univ of Tech, Eindhoven University of Technology

  • Diana Car

    Eindhoven Univ of Tech, Department of Applied Physics, Eindhoven University of Technology, Eindhoven University of Technology

  • Roy Op het Veld

    Eindhoven Univ of Tech, Department of Applied Physics, Eindhoven University of Technology, Eindhoven University of Technology

  • Petrus van Veldhoven

    Eindhoven Univ of Tech

  • Sebastian Koelling

    Eindhoven Univ of Tech

  • Marcel Verheijen

    Eindhoven Univ of Tech

  • John Logan

    University of California Santa Barbara, Materials Department, University of California, University of California-Santa Barbara, University of California - Santa Barbara

  • Mihir Pendharkar

    University of California Santa Barbara, Department of Electrical and Computer Engineering, University of California, Santa Barbara, University of California - Santa Barbara, Univ of California - Santa Barbara

  • Daniel Pennachio

    University of California Santa Barbara

  • Borzoyeh Shojaei

    University of California Santa Barbara

  • Joon Sue Lee

    University of California Santa Barbara, California NanoSystems Institute, University of California, Santa Barbara, University of California - Santa Barbara, Materials Science, University of California - Santa Barbara, Univ of California - Santa Barbara

  • Chris Palmstrom

    University of California Santa Barbara, Materials Department, California NanoSystems Institute, Electrical and Computer Engineering, University of California, University of California-Santa Barbara, California Nanosystems Institute, Dept. of Electrical and Computer Engineering, and Dept. of Materials, Univ of California - Santa Barbara, University of California - Santa Barbara, Electronics & Computer Enginneering, University of California Santa Barbara, Materials Department, University of California, Santa Barbara, Materials, University of California Santa Barbara, Univ of California - Santa Barbara

  • Erik Bakkers

    Eindhoven Univ of Tech, Department of Applied Physics, Eindhoven University of Technology, Eindhoven University of Technology

  • Sankar Das Sarma

    Univ of Maryland-College Park, University of Maryland

  • Leo Kouwenhoven

    Microsoft Station-Q Delft, Delft University of Technology, Delft Univ of Tech, Qutech and Kavli Institute of Nanoscience and Microsoft Station Q Delft, Delft University of Technology, QuTech, Kavli Institute of Nanoscience, Station Q at Delft University of Technology, Delft University of Technology, Microsoft Station-Q at Delft University of Technology, Delft Univ. of Technology, Microsoft Station Q, Station Q Delft, Microsoft, Microsoft Station Q